How does the Abra wallet handle unconfirmed transactions?

Abra natively supports: Bitcoin, Litecoin, and Bitcoin Cash

Deposits from an external cryptocurrency wallet will not show up in the Abra wallet until the transaction has at least one confirmation on its blockchain. Example, a Bitcoin transaction will need at least one confirmation on the Bitcoin blockchain (LTC will need one confirmation on the Litecoin Blockchain and BTC will need one confirmation on the Bitcoin Cash blockchain).

All transactions must be confirmed on its blockchain before they can be withdrawn to an external wallet/account or exchanged for another currency. Example, a Bitcoin transaction will need at least one confirmation on the Bitcoin blockchain (LTC will need one confirmation on the Litecoin Blockchain and BTC will need one confirmation on the Bitcoin Cash blockchain).

Only the 'send funds' transactions between Abra users will show up instantly.